So i want to upgrade my video card

right now the motherboard im using is the GA h55-usb3 and im not sure if the DDR memory of say the motherboard, the ram and the video card all have to be the same. I know my Ram is DDR3 but the video card i want is DDR5 and im pretty sure my motherboard is DDR3 right now im using a Geforce GTS 250 would i be able to upgrade to this video card with everything working right or would i need to find an older DDR3 video card.